OCAU have a detailed examination of Intel's "Pentium D" dual-core CPUs. This article compares the Pentium D 820, Pentium D 840, Pentium D 840 Extreme Edition, Pentium 4 3.73 Extreme Edition, Pentium 4 630, Athlon 64 X2 4800+ and Athlon 64 3500+. Loads of benchmarks, overclocking, power/cooling info and much more!